Using Solder Seal Heat Shrink Butt Connectors

What are your thoughts and experiences on using solder seal heat shrink butt connectors for wiring repairs? I have to say, I am a fan so far. Longevity of the repair is what I'm really interested in.
The ones I used in the video can be found on my Amazon Affiliate page here https://www.amazon.com/shop/scannerda...

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Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.